206 AMERICAN MIDLAND NATURALIST. 
variety, having to accept conditions that are opposed to its nat- 
ural tendencies, becomes more or less checked in its growth 
thereby, but it is no such restraint to the type which attains a 
size widely surpassing it. 
Chamaesyce erecta sp. nov. 
mos e basi emittens. Caules teretes, virides, vel rubescentes. 
Folia breviter petiolata, 1-114 cm. longa, spatulata vel obo- 
tuberculata vel rugosa, inter tubercula vel rugas haud vel le- 
viter foveolata 
nnual, light green, glabrous, erect, 1-2 dm. high, dichoto- 
ete, green or light red. Leaves short-petioled, 15-1 15 em. long, 
spatulate or obovate, oblique at the base, serrulate from the 
It differs from the other erect Species of this group, C. neo- 
mexicana (Greene) and C. consauguinea (Engelm.), chiefly by 
the extended indentation of its leaves, and by other characters 
le type locality for these spurges is Leeds, N. Dak., where . 
the first named species is common and the other is sparingly 
found during the months of J uly and August. The extension 
of their territories is unknown to me. 
Ranunculus eremogenes Greene var. Longissimus var. nov. 
. . bottom of the creek where it was growing. The lower leaves 
. Very long-petioled (1.5-4.5 dm.). Collected on June 27, 1907, 
in running water at Leeds, North Dakota. 
